Brake



L. E. LABRIE Sept. 1, 1931.

BRAKE Original F1185 Feb. 14, 1927 INVENTOR LUDGER E. LA BRIE .19 site sides of said shoes.

Patented Sept. 1, 1931 STATES PATENT OFFICE LUDGEB E. LA BRIE, OF SOUTH BEND, INDIANA, ASSIGNOR TO BENDII! BRAKE COMPANY, OF SOUTH BEND, INDIANA, A CORPORATION OF ILLINOIS BRAKE Original application filed February 14, 1927, Serial No. 168,044. Divided and this application filed April 1,

1929. Serial This invention relates to brakes and is illustrated as embodied in an internal expanding automobile brake. An object of the invention is to provide for interengagement of the shoes or the friction means of the brake to prevent lateral movement thereof by means of a one-piece cam device having parts straddling the ends of" the stiffening webs of the shoes and engaging roller-s on oppo- In the arrangement shown there are provided thrust rollers arranged on opposite sides of said ends and immediately adjacent said ends, which rollers are directly contacted by the one-piece cam. i

The above and other objects and features of the invention will be apparent from the following description of one illustrative enrbodiment shown in the accompanying drawings, in which:

Figure 1 is a vertical section through a brake just inside the head of the drum, showing the novel shoes and applying means in side elevation; and

Figure 2 is a partial section on the line 22 of Figure 1 showing the positioning of the shoes by the novel cam.

The brake selected for illustration includes a rotatable drum 10 at the open side 3 of which is a stationary support such as a backing plate 12 and within which is arranged the friction means of the brake illustrated as including shoes 14, 16 and 18 urged away from the drum toward idle position by means such as return springs 19 and 20.

According to an important feature of the invention, shoes 14 and 16 or their equivalents are provided at their adjacent ends and on opposite sides thereof with thrust rollers 22. The rollers 22 are preferably pivoted on spindles 24 and areengaged by my novel one-piece generally rectangular cam device 26 slotted at its ends to form furcations embracing the ends of web members 27 of shoes 14 and 16 to position the same laterally. The cam 26 applies shoes 14 and 16 against theresistance of the return spring 19 whereupon shoe 14 applies shoe 18 against the resistance of the auxiliary return spring 20. The one-piece cam 26 may be fixedly secured to its cam shaft 28 by a key or other well known securing means.

This application constitutes a division of my parent application 168,044, filed February 14, 1927.

While one illustrative embodiment has been described in detail, it is not my intention to limit the scope of the invention to that particular embodiment or otherwise than by the.terms of the subjoined claims.

What I desire to claim and secure by Letters Patent is:

l. A brake shoe having a stiffening web and rollers on opposite sides of said web a short distance from its end, in combination with a slotted cam straddling the end of the -stiffening web and engaging the rollers.

2. A brake shoe having a stiffening Web and rollers on opposite sides of said web a short distance from its end, in combination with a cam device including parts straddling the end of the stiffening Web and engaging the rollers.

3. A brake shoe having a stiffening web and thrust members on opposite sides of said web a short distance from its end, in combinationwith a slotted one piece cam straddling the end of the stiffening web and engaging the members.

4. A brake comprising, in combination, a rotatable shaft having at one end thereof a one piece cam secured thereto, said cam characterized by bifurcated ends which straddle the ends of webs on shoe members constituting the friction means of the brake, the ends of the furcations of said cam contacting thrust members on each side of the webs and spaced fron the ends thereof.

5. A brake comprising a generally rectangular one piece cam slotted at its ends to provide spaced furcations.

6. A brake comprising a generally rectangular one piece cam slot-ted at its ends to provide spaced furcations, in combination with spaced apart brake shoe members having projections adjacent its ends contacted by said furcations.

7. A brake comprising, shoes having thrust portions and pro ecting portions extending beyond the thrust portions, and a cam contacting the thrust portions and positioning the projecting portions.

8. A brake comprising an expanding cam formed with an operative surface on its periphery and a guiding slot Within the cam periphery.

9. A brake comprising, a generally rectangular cam rotatable about an axis, formed with a pair of slots on opposite sides of the axis adapted to serve as guides.

10. A brake comprising, a generally rectangular cam rotatable about an axis, said cam having its ends arranged at a greater distance from the axis than its sides, and formed With a pair of slots in the ends of the cam on opposite sides of the axis adapted to serve as guides.

11. A brake operating cam generally rectangular in shape formed with slots adapted toact as guides.

12. A brake operating cam adapted to ro-- tate about an axis, comprising a generally rectangular cam portion, and slots formed therein inwardly of the cam surface adapted to act as guides.

13. A brake operating cam adapted to rotate about an axis, comprising a pair of lobe portions and slots formed therein inwardly of the lobe surfaces adapted to act as guides.

, In testimony whereof I have hereunto signed my name.

LUDGER E. LA BRIE. 

